Optimization of intersubband resonant second-order susceptibility in asymmetric graded AlxGa1xAs quantum wells using supersymmetric quantum mechanics

S. Tomić, V. Milanović, and Z. Ikonić
Phys. Rev. B 56, 1033 – Published 15 July 1997
PDFExport Citation

Abstract

A systematic procedure is proposed for the design of ternary alloys based quantum-well structures optimized for double-resonance second-harmonic generation. The method relies on the supersymmetric quantum mechanics as derived here for the case of position-dependent effective mass. Starting from a symmetric, truncated quasiparabolic potential, itself lacking any second-order nonlinearity, we generate a family of asymmetric potentials, fully isospectral with the starting potential, and choose the one which maximizes the product of transition matrix elements relevant for the second-order nonlinearity. Realization of the optimized potential (in an approximate manner) by grading the ternary alloy AlxGa1xAs is then described. The best value of nonlinear susceptibility obtained exceeds those reported in the literature.

  • Received 1 November 1996

DOI:https://doi.org/10.1103/PhysRevB.56.1033

©1997 American Physical Society

Authors & Affiliations

S. Tomić

  • Laboratory of Physics (010), VINČA Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Yugoslavia

V. Milanović and Z. Ikonić

  • Faculty of Electrical Engineering, University of Belgrade, Bulevar Revolucije 73, 11000 Belgrade, Yugoslavia

References (Subscription Required)

Click to Expand
Issue

Vol. 56, Iss. 3 — 15 July 1997

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×